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Channel Posts
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3000 Solved Problems in Physics
Master physics with confidence through 3,000 fully solved problems covering the most important concepts taught in high school, college, and university courses. This comprehensive problem-solving guide is designed to strengthen your understanding, improve analytical thinking, and help you excel in examinations.
Each problem is presented with a clear, step-by-step solution, making even challenging topics easier to understand. Whether you are preparing for classroom tests, competitive exams, or simply reinforcing your knowledge, this book provides the practice needed to build lasting confidence.
Inside This Book
✅ 3,000 fully solved physics problems
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From mechanics and thermodynamics to electricity, magnetism, waves, optics, and modern physics, this book serves as a complete companion for mastering the principles of physics through practice.
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Practice more. Understand better. Score higher.
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| 2 |  This infographic titled "TYPES OF FUSES: MOST COMMONLY USED" displays eight standard types of electrical fuses, categorized into a 2 \times 4 grid, each with a representative image, category name, and brief description.
Here is a detailed breakdown of each type shown in the image:
1. Glass Fuse
Description: Features a transparent cylindrical glass body with metal end caps and a visible internal wire/filament.
Dimensions Specified: Commonly found in (5 \times 20\text{ mm}) or (6 \times 32\text{ mm}) sizes.
Function: Used in low-current electronics and consumer appliances. The clear glass allows for easy visual inspection to see if the internal fuse wire has blown.
2. Ceramic Fuse
Description: Similar in shape to glass tube fuses, but constructed with an opaque ceramic body and metal end caps.
Dimensions Specified: (5 \times 20\text{ mm}) ceramic body.
Function: Ceramic fuses offer higher thermal and arc resistance than glass fuses, making them safer for higher-current applications or places where high fault currents might cause glass to shatter.
3. SMD Fuse (Surface Mount Device)
Description: A tiny rectangular chip fuse designed to be soldered directly onto the surface of a Printed Circuit Board (PCB).
Labeling Shown: Marked with 3A (3 Amperes).
Function: Ideal for compact electronic devices (phones, laptops, controllers) where space is extremely limited.
4. Automotive Fuse
Description: A plastic, color-coded blade-style fuse with two conductive metal prongs sticking out the bottom.
Labeling/Rating: Marked with 10 (10 Amperes); typical ratings range from 2\text{ A} to 40\text{ A}.
Function: Standard safety device used in cars, trucks, and boats to protect 12V–24V DC vehicle electrical circuits.
5. Thermal Fuse
Description: A small, metallic barrel-shaped fuse with axial wire leads extending from both ends.
Function: Temperature-triggered rather than current-triggered. It trips when the ambient temperature exceeds a specific threshold, protecting devices like hair dryers, coffee makers, and power transformers from overheating.
6. Time Delay Fuse (Slow-Blow)
Description: A cylindrical glass/cartridge fuse with a coiled or modified internal element.
Labeling: 6.3A 250V (marked with 'T' for slow-blow/time-lag).
Function: Designed to withstand short, temporary current spikes (inrush current)—such as when a motor or large power supply turns on—without blowing, but it will open if an overload persists.
7. Self-Resetting Fuse (PTC Polyfuse)
Description: Typically a yellow or orange radial-leaded component resembling a disc capacitor.
Labeling: Marked P250 / 250.
Function: Made from Positive Temperature Coefficient (PTC) materials. When overcurrent occurs, its resistance spikes dramatically to stop current flow. Once the fault is cleared and the device cools down, it resets automatically without needing replacement.
8. High Power Fuse
Description: A heavy-duty ceramic cartridge fuse with sturdy metal mounting tabs (flanges) with holes for bolt-in installation.
Labeling: 40A (Large SI / ANL blade/bolt-down type).
Function: Used in high-current DC or AC applications such as car audio amplifiers, electric vehicles, industrial machinery, and power distribution systems. | 162 |
| 3 |  This infographic provides a visual step-by-step guide on how to test the internal electrical resistance of a spark plug using a digital multimeter to determine if it is functioning properly or needs replacement.
🛠️ Step-by-Step Testing Process
Remove Spark Plug: Carefully remove the spark plug from the engine bay.
Set Multimeter to Resistance : Turn the multimeter dial to measure resistance , typically in the kilohm setting.
Connect Red Probe: Touch the red probe to the top terminal (the metal tip where the spark plug wire/coil connects).
Connect Black Probe: Touch the black probe directly to the center electrode tip at the bottom of the spark plug.
Read the Measurement: Observe the value displayed on the multimeter screen.
📊 How to Interpret the Results
Multimeter ReadingSpark Plug Condition Action Required 3 - 10\OmegaGood / NormalThe internal resistor is healthy; plug is safe to reuse. / Infinite Open CircuitThe internal circuit is broken or burned out;
Replace.Fluctuating / UnstableInternal DamageMicro-cracks or internal resistor breakdown; Replace.
⚠️ Safety Tip: Always ensure the engine has cooled down completely before attempting to remove or test spark plugs to prevent burns and thread damage. | 146 |
| 4 | How to Look After a Refrigerator
(By Jonathan Elford)
Keep your refrigerator running efficiently and extend its lifespan with this practical maintenance guide by Jonathan Elford. Written in clear, easy-to-follow language, this book explains the essential care and maintenance techniques needed to keep refrigerators operating safely and effectively.
Whether you are a homeowner, technician, student, or someone interested in appliance maintenance, this book provides valuable knowledge on cleaning, temperature adjustment, troubleshooting common problems, routine servicing, and proper handling of refrigerator components.
Why You'll Love This Book
Practical step-by-step maintenance guidance.
Easy-to-understand illustrations and diagrams.
Helps improve refrigerator efficiency and performance.
Reduces the risk of common faults and costly repairs.
Suitable for beginners, DIY enthusiasts, and technicians.
A timeless reference for anyone who wants to maintain a refrigerator properly and save money through preventive care. Add this practical guide to your collection today and learn how to keep your refrigerator performing at its best for years to come.
https://ye-buna.com/ethioyared?ref=product_detail&product=6a631b4aadbec_ethioyared | 173 |
| 5 | Drawing 2.pdf | 274 |
| 6 |  No text... | 303 |
| 7 | Hello! I am a hard-working freelancer with 5 years of experience in design..
I turn complex mechanical concepts and rough sketches into production-ready 3D CAD models and technical 2D drawings.
►Cheek out my
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| 8 | ✅Upwork💼
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| 9 | Basic Electrical Engineering
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| 10 | ✅ለሞባይል ጥገና የሚያስፈልጉን ፦
1. መፍቻ ፦ ስልኮችን ለመፍታት እና ለመግጠም ይጠቅማል ፡፡
2.መልቲ ሜትር ፦ ሬዚስታንስ ፣ ቮልቴጅ እንዲሁም ከረንት ለመሰካት እና የሰርኪዩት ቀጣይነት ለማረጋገጥ ይጠቅመናል ፡፡
3. ቲነር ፦ ዝገት ለመከላከል እና ቆሻሻ ለማስወገድ ይጠቅማል ፡፡
4. ፔስት ፦ አይሲዎችን በመንቀያና በማስቀመጫ ሰአት ቦርዳችንና የሚነቀሰዉ አይሲ በሙቀት እንዳይጎዳ ይጠቅማል ፡፡
5. ብሎወር ፦ ሙቀትን በመስጠት አይሲዎችን ለመንቀልና ለማስቀመጥ ይጠቅማል ፡፡
6. ካዉያ ፦ ሁለት የተላቀቁ ክፍሎችን ለመበየድ ይጠቅማል
7. ሊድ ፦ ሁለት የተላቀቁ ክፍሎችን ለመበየድ እንደ ቀላጭ የምንጠቀምበት ነዉ ፡፡
8. ጃምፐር ዋየር ፦ ሁለት የተለያዩ የሰርኪዩት ክፍሎችን /የተላቀቁ ክፍሎችን/ ለማያያዝ የሚጠቅም ቀጭን ሽቦ ነዉ ፡፡
9. ትዊዘር(ፒከር) ፦ አይሲ ወይንም ሌሎች የሞባይል ክፍሎች በብሎወር ስናሞቅ እንደ
መቆንጠጫ የምንይዝበት ነዉ ፡፡
10.ዲሲ ፓወር ሰፕላይ ፦ ከባትሪ የምናገኘዉን 3.7 ቮልት የሚሆን ቮልቴጅ የሚሰጥ ክፍል
ነዉ ፡፡
https://ye-buna.com/ethioyared?ref=product_detail&product=6a5fcf53442da_ethioyared | 423 |
| 11 |  No text... | 441 |
| 12 | https://youtu.be/hIaSSfWG8SU?si=Eg-Vu8pBuIZSFebW | 514 |
| 13 | https://youtu.be/BBQBuENegTs?si=yDAd4XJuPeJis82M | 472 |
| 14 | +3 Mechanical Engineering
EXIT EXAM list
@Ethiopian_Digital_Library @Ethiopian_Digital_Library | 660 |
| 15 | All Grade 12 Students' Textbooks and Teachers' Guide Books
🇪🇹1.Mathematics textbooks & Guide Book
🇪🇹2.Physics textbooks & Guide Book
🇪🇹3.Chemistry textbooks & Guide Book
🇪🇹4.Biology textbooks & Guide Book
🇪🇹5.Geography textbooks & Guide Book
🇪🇹6.Civics textbooks & Guide Book
🇪🇹7. TD textbooks & Guide Book
🇪🇹8.ICT textbooks & Guide Book
🇪🇹9.Economics textbooks & Guide Book
🇪🇹10.English textbooks & Guide Book
🇪🇹11.አማርኛ textbooks & Guide Book
🇪🇹12.Afam-Oromo textbooks & Guide Book
🇪🇹13.Soomaali textbooks & Guide Book
ከላይ የተጠቀሱትን ሁሉንም የ 12ኛ ክፍል የተማሪዎች እና የመምህራን መምሪያ የያዘ App ስለሆነ ለአጠቃቀም ምቹ ነው።
እናም ለወዳጅ ጓደኛ ያጋሩ!!! 🙏🙏🙏 | 667 |
| 16 | New Updated
All Books Available
🇪🇹1. Mathematics 2. Physics
🇪🇹3. Chemistry 4. Biology
🇪🇹5. TD 6. Civic
🇪🇹7. Geography 8. Amharic
🇪🇹9. Afeesomaali 10. English
ከላይ የተጠቀሱትን ሁሉንም የ 12ኛ ክፍል መፅሀፍት የያዘ App ስለሆነ ለአጠቃቀም ምቹ እናም ለወዳጅ ጓደኛ ያጋሩ።🙏🙏 | 521 |
| 17 | New Updated
All Books Available
🇪🇹1. Mathematics 2. Physics
🇪🇹3. Chemistry 4. Biology
🇪🇹5. TD 6. Civic
🇪🇹7. Geography 8. Amharic
🇪🇹9. English 10.Economics
ከላይ የተጠቀሱትን ሁሉንም የ 11ኛ ክፍል መፅሀፍት የያዘ App ስለሆነ ለአጠቃቀም ምቹ ነው.እናም ለወዳጅ ጓደኛ ያጋሩ።🙏🙏 | 539 |
| 18 | New_updated
🇪🇹1. Mathematics 2. Physics
🇪🇹3. Chemistry 4. History
🇪🇹5. Geography 6. Economics
🇪🇹7. Citizenship 8. English
🇪🇹9. HPE 9.Biology
ከላይ የተጠቀሱትን ሁሉንም የ 10ኛ ክፍል መፅሐፎች የያዘ App ስለሆነ ለአጠቃቀም ምቹ ነው.
📖🎖ሼር አርጉላቸው 🙏 | 531 |
| 19 | New_updated
🇪🇹1. Mathematics 2. Physics
🇪🇹3. Chemistry 4. History
🇪🇹5. Geography 6. Economics
🇪🇹7. Citizenship 8. English
🇪🇹9. HPE 9.Biology
ከላይ የተጠቀሱትን ሁሉንም የ 10ኛ ክፍል መፅሐፎች የያዘ App ስለሆነ ለአጠቃቀም ምቹ ነው.
📖🎖ሼር አርጉላቸው 🙏 | 482 |
| 20 | New_updated
🇪🇹1. Mathematics 2. Physics
🇪🇹3. Chemistry 4. History
🇪🇹5. Geography 6. Economics
🇪🇹7. Citizenship 8. English
🇪🇹9. HPE 10. PVA
ከላይ የተጠቀሱትን ሁሉንም የ 9ኛ ክፍል መፅሐፎች የያዘ App ስለሆነ ለአጠቃቀም ምቹ ነው.
📖🎖ሼር አርጉላቸው 🙏 | 458 |
